Effect of fused silica subsurface defect site density on light intensification |
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| Authors: | Li Li Xiang Xia Yuan Xiao-Dong He Shao-Bo Jiang Xiao-Dong Zheng Wan-Guo Zu Xiao-Tao |
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| Affiliation: | [1]Institute of Physics and Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China [2]Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | The effect of defect density on the modulation of incident laser waves is investigated. First, based on the actual defect distribution in the subsurface of fused silica, a three-dimensional (3D) grid model of defect sites is constructed. The 3D finite-difference time-domain method is developed to solve the Maxwell equations. Then the electrical field intensity in the vicinity of the defect sites in the subsurface of fused silica is numerically calculated. The relationships between the maximal electrical field intensity in fused silica and the geometry of the defect sites are given. The simulated results reveal that the modulation becomes more remarkable with an increase of the defect density. In addition, the effect of the distribution mode of defects on modulation is discussed. Meanwhile, the underlying physical mechanism is analyzed in detail. |
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| Keywords: | defect site density laser-induced damage fused silica |
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